From owner-freebsd-questions@FreeBSD.ORG Sat Sep 25 03:27:56 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A927F16A4CE for ; Sat, 25 Sep 2004 03:27:56 +0000 (GMT) Received: from smarthost2.sentex.ca (smarthost2.sentex.ca [205.211.164.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5122B43D46 for ; Sat, 25 Sep 2004 03:27:56 +0000 (GMT) (envelope-from mike@sentex.net) Received: from BLUELAPIS.sentex.ca (cage.simianscience.com [64.7.134.1]) by smarthost2.sentex.ca (8.13.1/8.13.1) with SMTP id i8P3Rtg8001522; Fri, 24 Sep 2004 23:27:55 -0400 (EDT) (envelope-from mike@sentex.net) From: Mike Tancsa To: TM4525@aol.com Date: Fri, 24 Sep 2004 23:27:56 -0400 Message-ID: References: <68.44866630.2e859ba8@aol.com> In-Reply-To: <68.44866630.2e859ba8@aol.com> X-Mailer: Forte Agent 1.93/32.576 English (American) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable cc: freebsd-questions@freebsd.org Subject: Re: Device polling performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Sep 2004 03:27:56 -0000 On Fri, 24 Sep 2004 11:47:52 EDT, in sentex.lists.freebsd.questions you wrote: >I thought I'd reword my question since no one seemed to understand the = first=20 >time. > >Is there a way to measure CPU kernel/interrupt usage when device polling= is=20 >enabled on 4.x systems? top and systat both show 100% idle all of the = time. > Hi, As long as all your interfaces support polling, you should see hardly see any interrupt usage at all, as that is the whole point of polling. You can allocate more or less CPU cycles to flinging packets around via various sysctl settings. See the polling man pages for more info ---Mike